It doesn't matter how Geno compares to McNabb. It matters if he fits the system Reid likes to run. While you have backups like Kolb and Foles sprinkled in that run a traditional West Coast system from the pocket, most of Reid's successful offenses (McNabb, Garcia, Vick) were built around QBs who looked to throw first than used running as an escape route (Vick didn't always fit that bill, but he damn well tried. McNabb ran quite a bit, but much of that running was after he had exhausted a lot of his passing options).

Also keep in mind that Andy Reid doesn't typically have a very good offensive line, so you're not going to want a Tyler Wilson back there.